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Harvey Weinstein attends The Weinstein Company and Lexus Present Lexus Short Films at the Directors Guild of America Theater on Thursday, Feb. 21, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

The NYPD's top detective says the department has gathered considerable evidence in the rape investigation of Harvey Weinstein. But it's up to the district attorney whether the case makes it to a grand jury.

Chief of Detectives Robert Boyce told reporters Wednesday that investigators have been working diligently with women who made allegations in the fall that they were raped by Weinstein.

He says witnesses are prepared to go before a grand jury which would decide whether to indict.

"We are still accumulating evidence," he said. It’s going very, very well. We have people who are getting ready to go to the grand jury."

He added, "I would ask you to talk to (Manhattan District Attorney) Cy Vance about that – DA Vance – it’s his case right now. We’ve accumulated quite a bit of evidence and I would ask you to ask him for his schedule, where it goes forward."

Vance hasn't commented, saying only that the investigation is being handled seriously.

Weinstein's attorneys have said he has done nothing criminal and reject any allegation of non-consensual sex.